The article "Treatment of Thyrotoxicosis," by Iagaru and McDougall(J Nucl Med. 2007;48:379389), contained some errors.On page 380, in the fourth line from the bottom of the rightcolumn, "1,500 mm" should be "1,500/mm3." On page 382, in theseventh line from the bottom of the left column, "160 mCi" shouldbe "160 µCi." On page 383, in the twelfth line from thetop of the left column, "MBq" should be "MBq/g" and "µCi"should be "µCi/g."